Motolimod

This is an open label, Phase 1b pre-operative window of opportunity biomarker trial to analyze the combination of intravenous (IV) anti-PD-1 inhibitor, nivolumab, given along with toll-like receptor 8 (TLR 8) agonist motolimod delivered either subcutaneously (SC) or by intratumoral injection (IT) in subjects with squamous cell carcinoma of the head and neck (SCCHN). Subjects with previously untreated, resectable SCCHN, will be recruited onto this trial and will initially undergo pre-treatment diagnostic imaging and biological sample collection. These subjects will undergo pre-operative study treatment for a 3 to 4-week period prior to a scheduled surgical resection.

This phase Ib trial studies the best way of TLR8 Agonist VTX-2337 and cyclophosphamide in treating patients with a solid tumor that has spread from the primary site (place where it started) to other places in the body (metastatic), progressed for a long time (persistent), come back (recurrent), or is growing, spreading, or getting worse (progressed). TLR8 Agonist VTX-2337 may stimulate the immune system in different ways and stop tumor cells from growing. Drugs used in chemotherapy, such as cyclophosphamide, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Giving TLR8 Agonist VTX-2337 together with cyclophosphamide may be a better treatment for solid tumors.